Aim and objective:For permanently replacing missing teeth, dental implant placement is a common treatment procedure in dentistry. The success rates of implants depend on the presence of healthy surrounding tissue and finally amount of marginal bone levels. In this study we aimed to compare marginal bone loss around implants in implant supported removable prosthesis in smokers and non smokers.

Results:Marginal bone loss was affected by the smoking and severity of loss was increased signficantly from 6 to 24 months (p< 0.05) in smokers. Age was also significantly related to marginal bone loss, while, there was no significant relationship between marginal bone loss and gender or implant length or diameter (p>0.05). Plaque index and probing depth was higher in smokers, while gingival index was higher in non-smokers.

Conclusions:Implants used for removable prosthesis in the elderly smokers may be at higher risk to present marginal bone loss leading to loss of implants.